Re: [ gpsdrive ] Custom map scale question

[Hamish <hamish_nospam@yahoo.com>]

Grand Central wrote:
> I created a map, 1280x1024.
> The 1280 pixels are exactly 32 kilometers.
> 
> Does that mean that the map scale that I need to enter into
> map_koord.txt is 32000?

No.

gdal_slice.sh
#  You can figure out the "scale" factor by meters/pixel * 2817.947378
#    2817 is maybe someones monitor dpi converted to pixels/meter??
SCALE=`echo $M_PER_PIXEL | awk '{printf("%d", 0.5 + ($1 * 2817.947378) )}'`



so the scale factor is (32000/1280) * 2817.947378  =  70449


You need to make sure you name the image/dir with top_ or map_ as well,
depending on if the map was from a lat/lon (degree based) or projected
(meter based) source (e.g. UTM).


Hamish
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